Advanced Semi-Active Resetable Devices and Device Modeling Including Non-Linearities

摘要

Resetable devices are a novel semi-active approach to managing structural responseenergy. Recently developed devices allow independent control of each chamberenabling unique approaches to sculpting the structural hysteresis loops andbehaviour. This paper creates a non-linear model of experimental prototypes that isfully generalisable, and does so in a step-by-step fashion adding each non-linearaffect individually. Non-linearities that can significantly affect performance,including valve size, mass flow rate and friction are characterised experimentallyand modeled. The results are validated against experimental data for cases of allforms of device control, as well as for several experimental cases utilizing externalpressurized sources to enhance the force capacity. Force capacity, using apressurised reservoir and/or accumulator increased force capacity of these devicesfrom 100-600%, increasing the potential of these designs and approach to seismicenergy dissipation. Final model results have less than 5% error compared tononlinear experimental data. There is a strong correlation between the fundamentalnonlinear dynamics modelled and the experimental results, validating the overallmodel and approach. The overall results and approach are fully general forapplication to the design or analysis of similar device systems.